Selecting system



Nov. 17 1925- "P. M. RAINEY SELECTING SYSTEM Filed Aug. 17, 1920 p F V, I W Z 3 mg smwifi w, m fi. Q

other, while during mid-day the tratfic is Patented Nov. 17, 1925.

' UNITED STATES PATENT OFFI E-.

PAUL M. RAINEY, or GLEN RIDGE, NEW JERSEY, ssreuon' TO was/rum: ELECTRIC COMPANY, INCORPORATED. or NEW.YORK, NJ'Y, A CORPORATION on NEW YORK.

SELECTING SYSTEM.

Application filed August 17, 1920. Serial No. 404,212.

To all whom it may concern:

Be it known that I. PAUL M. RAINEY, a citizen of the United States, residing at Glen Ridge, in the county of Essex, State 6f New Jersey, have invented certain new and useful Improvements in Selecting Sys toms, of which the following is a full, clear, concise, and exact description.

This invention relates to selecting systems and particularly to new and useful improvements in printing telegraph systems' of the start-stop type. I

An object of the invention 'is the provision of a printing telegraph system of the above character arranged for either simplex or two way operation and one which does not require two ,way balancing equipment for two-way operation. i

Another object of the invention is theprovision of means associated with the transmitting and receiving equipment at each of a plurality of stations whereby these equipments may be alternately connected with the telegraph circuit connecting such stations.

This invention is particularly suitable for?) handling telegraphic traffic between stations where the direction of maintrafiic varies during the day or duringagiven period of time. There are many instances. where during the morning the main traffic is" in one direction, that is, from one city to anevenly distributed in both directions, and

during the afternoon or evening hoursthe main trafiic is in the direction oppositeto that of the morning trafiic. The system of this invention is so arranged that it may be operated simplex during the morningand evening hours or when the main traffic is in one direction, and may be operated in both directions when the trafiic is more evenly distributed in both directions. The system possesses the advantage that it may be readi- 1y changed from two way to simpler: opera- -tion or vice versa, and approximately the same number of words per minute can be handled in either direction by simplex operation as can be handled in both directions by two way operation. This, as will be evident from the following description, is accomplished in an eflicient and reliable manner without the provision of expensive apparatus. I v

It is to be understood that the term 'two wayoperation as herein used, does not mean the simultaneous transmission of signaling impulses in both directions, but instead means the alternate transmission of. message characters from each end of the signaling conductor.

For attaining the above objects, the invention contemplates the employment of a transmitting and receivingdis'tributorof-the start-stop type at each station on a telegraph circuit, which serve, toconnect.- the equipments individual thereto with the telegraph circuit. In order that the stations at which such equipment is located may alternately transmit and receive message impulses over such circuit, means is provided under the control of the distributors for accomplishing this result; that is, the transmitting disstored inthe. signal-storing means, causes the operation of further means for connecttributor, just after clearing out the impulses character impulses ,from the distant sta- .tion, where the transmitting distributor is the receipt of .such impulses.

A better understanding of the invention may be had from the following detailed deautomatically connected with the line after scription when considered'in conjunction with the accompanying-drawing, wherein only so much of the system has been shown shown in the drawing'is located, it will be seen that connected to the line 5 is a transmitting distributor 7-and a receiving distributor 6. The former distributor connects the transmitting apparatus to the line, while the latter connects the receiving recording mechanism thereto.

The transmitting apparatus comprises current control means 8, which in the preas is necessary for a clear understanding of 1 group of perforations in alingment withthe contacts 9 to 13, inclusive, a magnet 14 is arranged to be operated upon each revolution of the brush arm of the transmitting distributor 7 for accomplishing this result,

as will be more clearly described hereinafter. Associated with the cont-acts 9 to 13, inclusive, there is a plurality of signal storing relays 15, 16, 17, 18 and 19 which are provided for storing the impulses inaccordance with the operation of the selected contacts. Each of these relays has two windings, one of which-serves to initially energize the relay, while the other serves to maintain the relay energized after its contacts have once been closed. Each relay is also provided with two armatures, one for extending circuits to the segments of the transmitting distributor 7; and the other serving to complete a locking circuit therefor.

The recording mechanism shown at 20 embodies a series of selecting magnets 21, 22,23, 24 and 25 which have their windings connected with the various segments of the segmented ring of the receiving distributor 6. Thus the windings of these magnets will be successively connected, upon the release of the brush 'arm 63 with the front contact of relay 48 which is energized in accordance with the impulses received'from the distant station over the line conductor 5. The conductor 26 which is shown extending from a segment of the receiving distributor may,

be connected with a printing magnet for effecting the printing of a character as determined by the operation of the selecting magnets. I I

The transmitting distributor comprises a brush arm 27 which is frictionally mounted on a constantly revolving shaft 28. The arm 27, is held against rotation by means of a latch 29 under the control of a release magnet 30. Secured to this brush arm 27 is a pair of brushes 31 and 32. The former of these brushes cohnects the continuous ring 33 with the segments 34, 35, 36, 37 and '38,. to which the upper armatures of the storing relays are connected. The latter brush, however, bridges the continuous ring 40 with the local segments 41, 42 and 43.

In order that the storing relays will not be operated for storing the impulses until the distributor arm 27 has completed its cycle, a relay 54 is provided, which is adapted to be energized upon the energization of any one of the storing relays 15 to 19, inclusive. The energization of this relay 54 opens at its contacts the initial energizing circuits of-the storing relays, which are completed through the selecting contacts of the tape transmitter. Upon the passage of brush 32 over, segment43 a circuit is completed including the relays 47 and 61 with the source of battery. Relay 47 in operating opens at its contact the energizing circuit of relay 54 as well as the locking circuit of the storing relays; Thus it is seen that after this relay is operated and released, the storing relays 15 to 19 inclusive may then be actuated for storing impulses in accordance with the actuation of the selected contacts.

The reception of impulses is accomplished by providing a line relay 48 which is connected in circuit with the conductors 4 and 5, and the alternate contacts of key 52 the latter of which, as previously described, extends to a distant station. This relay 48 is normally energized by current flowing from the battery 77, conductor 4, through the contact of switching key 52, back contact of relay 53, contact 7 8 of key 52 and winding of relay 48 to the line 5. The front and back contacts of this relay 48 are connected with segments 51 and 50 respectively, of the receiving distributor 6. These segments 50 and 51 are arranged to be bridged with. the segments associated therewith by means of, a brush 60. From this it is seen that the energization of release magnet 58 for releasing the arm 63 is controlled through the back contact of relay 48, while the energizationof the selecting. magnets is controlled through the front contact thereof. Thus if the front contact of this relay is closed at'the time brush 60 is passing over segment 71, selecting magnet 21 will be energized for elfecting the oper- I ation of the selecting mechanism controlled thereby. This circuit extends from grounded battery, winding of selecting magnet 21, segment 71, brush 60, segment 51, front contact of relay 48, and normal contacts and armatures of relays 57 and 61 to ground.

A brief description of the apparatus employed having been given,'it is thought that the invention may be more readily understood from a description of the operation of the system. Since the sim lex operation of the system difi'ers but little fromthe system illustrated iuPatent No. 1,324,838, December 16, 1919, a description thereof is considered unnecessary. The following description will therefore be devoted to the operation of the system wlferein the transmitting ahdvreceiving equipments 'are alternately connected with the line conductor or telegraph circuit.

In the preferred form of the invention, a five unit code consisting of mpulses of cur a rent and intervals of no current is emtacts.

ployed in the selection of each character. Therefore, in describing the operation'of the system, let it be assumed that a signal composed of the following units is to be transmitted: current, 'no current, no current, current and current. When it is desired to operate the system-in the above manner, key 52 must be actuated to close its alternate consure of the alternate contacts thereof such as 68, 70, 74 and 78 places the energizing circuit of relay 48 under the control of relay 53 rather than being directly controlled through the segments of the transmitting distributor, as inthe case when the key 52 is in its normal position. .After the alternate contacts of key 52 have been closed, in order to condition the system for operation,

it is necessary to momentarily o erate a start'key for causing the closure 0 contact through the segments of the transmitting distributor 7. The closure of the right-hand contact of relay 57 establishesan energizing.

circuit for relay 53 which uponopening its normal contacts disconnects the batte 77 from the Winding of relay 48.. Relay 48 thereupon releases its armature and closes itsback contact. Release magnet 58 will,

. 29 permits the arm 27 to revolve withthe however, not be energized at this time as the energizing circuit therefor was previously broken due to the energization of relay 57 upon the closure of contact 56. Relay 64 in closing its right-hand contact establishes an energizing circuit for release magnet 30 which is thereupon operated. The opera? tion of this magnet and withdrawal of latch constantly revolving shaft 28.

In accordance with the previously men tioned group of selecting units or impulses. contacts 9, 12 and 13, of the transmitter will be closed, thereby completing the energizing circuit for restoring'relays 15, 18'and 19. These circuits extend from grounded bat tery, through the windings of these relays, the closed contacts of the transmitter '8 and the normal contact of relay 54 to ground. Storing relays 15, 18 and 19 thereupon close their contacts to extend the circuits .con-- trolled by the upper .armatures of these relays to the segmentsof the transmitting dis- The actuation of key 52 and the 010- tributor which are subsequently. connected with the line 5 by the brush 31, and also establish locking circuits upon the closure of the lower contact of each of these relays. Relay. 54 is also energized at thistime and attracts its armature for opening the initial energizing circuit of the storing relays 15, 18 and 19. The operation of release magnet 30,

as before described, withdraws the latch 29 and permits the brush arm 27 to revolve with the shaft 28. causes the circuit extending from the bat- The release of the arm 27 tery 77 to the line ,5, through the segment 39, the brush 31 and ring 33 of the transmitting distributor to be broken. This therefore disconnects the battery 77 from the line and permits relay 48 at the distant station to close'its back contact. The closure of the back contact of relay 48 of the distant station completes the energizing circuit for release magnet 58. I This circuit may be traced from the battery through the winding of release magnet 58, segment 59, brush 60, segment 50, baclg contact of relay 48, normal contact of relay 57 and the contact and armatureof relay 61'to ground. Release magnet 58, in operating, withdraws the latch 62 for permitting the arm 63 to revolve.

The passage of'the sending brush 32 over ")5.

segment 42 completes an energizing circuit for magnet 14. This magnet, in operatin causes the operation of suitable mechanism-- v(not shown) to advance the transmitting tape for positioning the next succeeding group of perforations in alignment with the selecting contacts 9 to 13 inclusive, but inasmuch as relayv 54 at this time is energized,

the storing relays connected with the actuated contacts will not be energized. Brush 32 in passing'o'lf of segment 41 opens the v 1 locking circuit of relay 64which is thereupon deenergized, and disconnects the source of battery from the winding of release magnet 30.. Thus the latch 29 willbe restored to 4 its normal position for engaging the arm 27 after it has completed one cycle. As the arm 27 revolves, segment 34 to which the upper armature of relay 15 is connected is bridged with ring 33 by the brush 31 and since storing relay 15 is energized, the batter'y 77' will be connected with the line conductor 5. This circuit may be traced from key' 52, contact 69 of relay 53, contact 68 of key 52,.conductor 67, upper armature of relay 15, conductor 66, segment 34, brush 31, segment 33, conductor 65, contact 74, conducbattery 77 through conductor 4, contact 70 of tor 63 and contact 75 of relay 53 tothe line.

conductor 5. At the distant station, relay 48 is thus energized for completing the circuit for the selecting magnet 21 u onthe passage of brush 60 over segment 1. 1 Se- .lecting magnet 21 will thereupon ble enerrom attery,.

gized over a circuit extending I through the winding of selecting magnet 21,-

segment 71, brush 60, segment 51, contact of relay' 48, normal contact and armature of relay 57 and the contact and armature of relay 61 toground, for operating the selecting mechanism controlled thereby. Since se-v lecting relays 16 and 17 have not been energized, no impulses will be transmitted to the line upon the passage of the brush 3]. over the segments to which the upper armatures of these relays are connected. Relay 48 at the distant station will thus remain deenergized during the period brush 31 is passing over segments35 and 36, and selectin magnets 22 and 23 at the distant station will also not be operated for operating the selecting mechanism controlled thereby. However, when the brush 31 passes over segment 37, an impulse will be transmitted to cause the operation of relay 48 in the manner previously described. The same is true when the brush 31 passes over segment 38. The selecting magnets at the distant station corresponding with the storing relays will of course be operated in the same .manner as previously described for relay 21.

Just before the arm 27 is arrested by the latch 29, segment 43 is bridged with ring 40 by the brush 32. Relays 47 and 61 are thereupon energized over a circuit extending from battery, through the winding of relay 61, segment 43, brush 32,. and ring 40 to ground. Relay 47 functions as previously described while relay 61, upon opening its contact, causes the deenergization of relay 57. This relay 57, in releasing its armature, removes battery from the winding of relay 53, which closes its normal contacts. The closure of the normal contacts of relay 53 again connects the battery 77 with the winding of relay 48 which thereupon attracts its armature for preventing the energization of release magnet 58 upon the closure of. the contact of relay 61. w

When the brush arm 63 of the receiving distributor at the distant station, has nearly completed its cycle, brush 60 carried thereby bridges segments 72 and 73, thus causing the contacts extends the conductors 4 and 5 tothe transmitting distributor, through the alternate contacts of key 52. As previously described in connection with the-initial starting of the system, release magnet 30 at the ment.

distant station is energizedupon the closure of the right-hand contact of relay 64. The latch 29 is thereupon withdrawn from engagement with the arm 27 which is allowed to revolve with the shaft 28. if any of the storing relays 15 to 19, inclusive, have been energized, the impulses stored due 'to the operation of these relays will be transmitted over the conductor 5 described.

After the transmission of the message has in the manner above been com leted, and it is desired to stop the distributors, key 76 is opened during one re ceiving cycle. The sixth impulse is thus interrupted anddoes not reach the starting relay 64; hence the distributors at both stations are'stopped.

. From the foregoing description it will be seen-that the systemof this invention. is one which may be readily changed from simplex operation to two way operation without the employment of duplex balancing equip- W hen it is desired to transmit messages in one direction only, the key '52 is positioned, as shown in'the drawing, and when it is desired to transmit message charactersalternately from each end of the line circuit, the key 52 is actuated to close its alternate contacts in order that the transmitting and receiving distributors at both stations may co-act properly in the simultaneous transmission and reception of the message characters. It is to be understood that transmission of messages in both directions simultaneously does not mean the simultaneous transmission of impulses in both directions. The groups of impulses representin the characters of a message are transmitted alternatingly from each end of the line conductor.

What is claimed is:

1.-A printing telegraph system comprising a line and a plurality of stations connected by said line, periodically rotating transmitting and receiving distributors at each of said stations, a relay normally connected in said line for controlling the opera tion of said receiving distributor, a relay adapted to' be energized by said receivin distributor and thereafter controlled by sai transmitting distributor, and a further re lay responsive to'the operation of said 560%] ond-mentioned relay for disconnecting said? first mentioned relay from the line arid-"conf-z 1 .0

necting said transmitting distributor thereto.

2. A printing telegraph system comprisinga. line, a plurality of stations connected by said line, periodicallv rotating transmit ting and receiving distributors at each of said stations, circuits controlled by each; of said distributors, a relay normally connected in said line for controlling the operation of said receiving distributor, a relay controlled.

initiall by said receiving distributor and therea ter by said transmitting distributor,

a further relay responsive to the operation 'and reconneolns the line relay in the line of said second mentioned relay for disconcircuit; necting said first mentioned relay from the In Witness whereof, I hereunto subscribe 10 line and oonnectin thereto said transmitmy name this 12th day of August A. D.,

5 ting distributor,.an means operative by said 1 transmitting distributor for causing the de cnergization of said second mentioned relay PAUL M. RAINEY. 

